So does anyone know where to get good "power" drumsets? More specifically, I'd love a kit that replicates what I've heard on Virtua Tennis for the Dreamcast. (I guess the Chaos SoundFont bank comes close, but I'm not sure…)

That's a pretty big subject according to needs and budget.
 
I'm not familiar with Virtual Tennis ... ([Update] ... I since checked out a YT vid ... I'm on the right track ... Rock/Heavy)
 
... but if it's just loops / samples you are after then Dead Winter Audio has some quality analogue freebies and samples of their commercial offerings ... of course, to encourage a purchase. There's a free Yamaha Maple 'kit'.
 
Otherwise:
See my recent responses to a Steam Forum post regarding drum 'software'.
- If you have:
Music Creator - SI Drums -  Aggressive / Full throttle kits
Sonar X3/Studio - Session Drummer 3 -  Rock / Tight / OldZep kits
Sonar X3 Producer - Addictive Drums 2 - Studio Rock kit (included) or Fairfax / Metal
- DrumMix have a free offering inclusive of their basic interface.

Double Post - removed
 

No, no loops; I want a virtual instrument I'd like to plug in whatever I already have in MIDI, either my own works or someone else's.
 
If you're unfamiliar with Virtua Tennis, just search for the Select Player music on Youtube; that should give you an idea of what sound I'm looking for. (I cannot plug specific URLs yet sadly)
 
And yeah, basically, I just want a kit with the sound I'd like out of the box—nothing I'd have to EQ or anything afterward. (However, if the drum software itself comes with similar options (like the first Session Drummer I had for SONAR), I'll consider fiddling with them to get the tone I want, but ONLY if I can get the tone promised) Nothing more than $100, I'm thinking. If I'm right, I want a real-sounding kit, but with POWER: deep yet resonating bass kick, snare, and toms, and each identifiable over each other.
 
Just wondering if this is all feasible? Sometimes I'm a stickler for this sort of thing.
 

I just updated my post above  - check again :)

The software is stopping me for posting links again.
 
Getting something that requires no work on your part will be tough. I suggest you look at BFD Eco, it's $99 but is often on sale for much, much less.
 
Its very versatile and one of the presets may get you close enough, but with a little work on EQ and compression you could get closer.
 
Toontrack's Metal Machine EZX would be very close out of the box, but you would also need EZDrummer to run it so it would be above your budget.
 
 
 
 

Missed a great deal last week - BFD ECO was $29 for a day. :(

Have a listen to this: https://soundcloud.com/joe-jaeger/rush-yyz-cover-by-joe-jaeger
 
If that's the kind of drum tone you're after, I believe that's Steven Slate Drums.

Shellstax: I remember poking around Session Drummer 3 a lot, and yet none of the kits seemed quite right. As per your suggestion, I peeked in my folder to see which kits you were referring to. I do seem to have the OldZep and Tight kits, but I don't see anything labeled Rock or Heavy. Were would I find those? Would I have them already, or are they in the store?
 
It's weird, though; after listening to the track and the Chaos SoundFont again, they seem further apart now, and am starting to hear a bit more familiar to the Session Drummer kits than before. I might go back and listen a little better to each some time.
 
Although, I also gave a listen to your other suggestion, DrumMix, and I have to say, the Metal one just might be right up my alley. I've just dropped the $50 on it, and I'll see what I can do with that.
 
Thanks for your tips!

After listening to that I'll just give up now.